CVE-2024-9476 is a vulnerability identified in Grafana Labs' Grafana OSS and Enterprise editions, specifically versions 11.2.0 and 11.3.0. The flaw arises from improper access control in the Grafana Cloud Migration Assistant component, which is used to migrate data between Grafana instances or organizations. Grafana supports multi-tenancy through its Organizations feature, which logically isolates resources and dashboards between different organizational units within the same instance. This vulnerability allows a user with privileges in one organization to escalate their access and view or manipulate resources belonging to other organizations within the same Grafana instance. The root cause is linked to CWE-266, which refers to improper access control or permissions. The attack vector is local (AV:L), meaning the attacker must have some level of authenticated access to the Grafana instance. The attack complexity is low (AC:L), and no additional privileges beyond those already held by the attacker are required (PR:H). User interaction is necessary (UI:A), likely involving the use of the migration assistant interface. The vulnerability impacts confidentiality significantly (VC:H) but does not affect integrity or availability. No known exploits have been reported in the wild, and no patches were linked at the time of publication, indicating that remediation may still be pending or in progress. This vulnerability is particularly concerning for organizations that rely on Grafana's multi-organization feature to segregate sensitive data between departments or clients, as it undermines the isolation guarantees. Attackers exploiting this flaw could access dashboards, metrics, and potentially sensitive operational data from other organizations, leading to information disclosure and potential compliance violations.

For European organizations, this vulnerability poses a significant risk to data confidentiality within multi-tenant Grafana deployments. Organizations that use Grafana to monitor critical infrastructure, IT systems, or business metrics often rely on the Organizations feature to ensure data segregation between departments, subsidiaries, or clients. Exploitation could lead to unauthorized access to sensitive operational data, potentially exposing business secrets, customer information, or security monitoring data. This could result in regulatory non-compliance, especially under GDPR, where unauthorized data access must be reported and mitigated. The breach of confidentiality could also damage trust with clients and partners. Since Grafana is widely used across various sectors including finance, manufacturing, and public services in Europe, the impact could be broad. However, the requirement for authenticated access with elevated privileges limits the attack surface to insiders or compromised accounts. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits once patches are released. Organizations with complex multi-organization Grafana setups are at higher risk, and those with lax access controls or insufficient monitoring are particularly vulnerable.

1. Monitor Grafana Labs advisories closely and apply official patches or updates as soon as they become available for versions 11.2.0 and 11.3.0. 2. Until patches are applied, restrict access to the Grafana Cloud Migration Assistant feature to only the most trusted administrators. 3. Review and tighten organization membership and role assignments to ensure users have the minimum necessary privileges. 4. Implement strong authentication mechanisms, including multi-factor authentication, to reduce the risk of account compromise. 5. Audit Grafana logs regularly for unusual access patterns, especially cross-organization resource access attempts. 6. Consider segmenting Grafana instances by organization if feasible, to reduce the risk of cross-organization data leakage. 7. Educate administrators and users about the risks of privilege escalation and the importance of following least privilege principles. 8. Employ network-level controls to limit access to Grafana instances and migration assistant interfaces to trusted networks or VPNs. 9. Prepare incident response plans that include steps for containment and remediation if unauthorized access is detected. 10. Engage with Grafana support or security teams for guidance and updates on this vulnerability.